Again some ideas with plums :)

For 12 Muffins you need:

150g butter
2 eggs
175g sugar
1 package of vanilla sugar
150g flour
0.5 teaspoon of Natron
100cc milk
1 teaspoon of baking powder
6 plums (wash and halve plums, remove pits)

for the topping
100g flour
80g (brown) sugar
1 teaspoon of cinnamon
120g butter

oven baking temperature: 180 C°
baking time: ~25min

Instruction:
1. Beat butter, sugar and vanilla sugar together until it becomes creamy
2. Add the eggs and continue mixing
3. Mix the flour with natron and the baking powder, add the flour-mixture and the milk alternately to the butter-egg-mixture
4. Fill the dough into the baking cups and put one halved plum on it
5. Mix all the ingredients for the topping and knead the dough until it becomes crumbly
6. Then sprinkle the crumbly dough over the plum until it“disappears”
7. Bake the muffins and let it cool completely on a rack

some are raspberry muffinsadd some icing on it!